transport: simplify duplicating a substring in transport_get() using xmemdupz()

diff --git a/archive-zip.c b/archive-zip.c
index a8d119305ff5c0161e7239a8ad70a92c76122631..4bde019bce632703d4e336d6404693487cdbcdfb 100644 (file)
--- a/archive-zip.c
+++ b/archive-zip.c
@@ -111,8 +111,9 @@ static void copy_le32(unsigned char *dest, unsigned int n)
        dest[3] = 0xff & (n >> 030);
 }
 
-static void *zlib_deflate(void *data, unsigned long size,
-               int compression_level, unsigned long *compressed_size)
+static void *zlib_deflate_raw(void *data, unsigned long size,
+                             int compression_level,
+                             unsigned long *compressed_size)
 {
        git_zstream stream;
        unsigned long maxsize;
@@ -120,7 +121,7 @@ static void *zlib_deflate(void *data, unsigned long size,
        int result;
 
        memset(&stream, 0, sizeof(stream));
-       git_deflate_init(&stream, compression_level);
+       git_deflate_init_raw(&stream, compression_level);
        maxsize = git_deflate_bound(&stream, size);
        buffer = xmalloc(maxsize);
 
@@ -231,7 +232,6 @@ static int write_zip_entry(struct archiver_args *args,
                size = 0;
                compressed_size = 0;
                buffer = NULL;
-               size = 0;
        } else if (S_ISREG(mode) || S_ISLNK(mode)) {
                enum object_type type = sha1_object_info(sha1, &size);
 
@@ -265,14 +265,11 @@ static int write_zip_entry(struct archiver_args *args,
        }
 
        if (buffer && method == 8) {
-               deflated = zlib_deflate(buffer, size, args->compression_level,
-                               &compressed_size);
-               if (deflated && compressed_size - 6 < size) {
-                       /* ZLIB --> raw compressed data (see RFC 1950) */
-                       /* CMF and FLG ... */
-                       out = (unsigned char *)deflated + 2;
-                       compressed_size -= 6;   /* ... and ADLER32 */
-               } else {
+               out = deflated = zlib_deflate_raw(buffer, size,
+                                                 args->compression_level,
+                                                 &compressed_size);
+               if (!out || compressed_size >= size) {
+                       out = buffer;
                        method = 0;
                        compressed_size = size;
                }
@@ -353,7 +350,7 @@ static int write_zip_entry(struct archiver_args *args,
                unsigned char compressed[STREAM_BUFFER_SIZE * 2];
 
                memset(&zstream, 0, sizeof(zstream));
-               git_deflate_init(&zstream, args->compression_level);
+               git_deflate_init_raw(&zstream, args->compression_level);
 
                compressed_size = 0;
                zstream.next_out = compressed;
@@ -370,13 +367,10 @@ static int write_zip_entry(struct archiver_args *args,
                        result = git_deflate(&zstream, 0);
                        if (result != Z_OK)
                                die("deflate error (%d)", result);
-                       out = compressed;
-                       if (!compressed_size)
-                               out += 2;
-                       out_len = zstream.next_out - out;
+                       out_len = zstream.next_out - compressed;
 
                        if (out_len > 0) {
-                               write_or_die(1, out, out_len);
+                               write_or_die(1, compressed, out_len);
                                compressed_size += out_len;
                                zstream.next_out = compressed;
                                zstream.avail_out = sizeof(compressed);
@@ -394,11 +388,8 @@ static int write_zip_entry(struct archiver_args *args,
                        die("deflate error (%d)", result);
 
                git_deflate_end(&zstream);
-               out = compressed;
-               if (!compressed_size)
-                       out += 2;
-               out_len = zstream.next_out - out - 4;
-               write_or_die(1, out, out_len);
+               out_len = zstream.next_out - compressed;
+               write_or_die(1, compressed, out_len);
                compressed_size += out_len;
                zip_offset += compressed_size;